CHAPTER 13 STORMWATER POLLUTION PREVENTION PLAN

Metropolitan Nashville - Davidson CountyStormwater Management ManualVolume 2 - Procedures

May 2000

CHAPTER 13STORMWATER POLLUTION

PREVENTION PLAN

Volume No. 2Chapter 13 - 1


May 2000

Chapter 13STORMWATER POLLUTION PREVENTION PLAN

Synopsis

Pollution prevention can take many forms at a construction site of an industrial/commercialfacility. Some practices may be self-evident, while others may be subtle changes in employeeroutines and habits. However, there are some practices that require decisive planning,implementation and follow-up, inspection, and maintenance. This chapter is intended to provideguidance for preparing a Stormwater Pollution Prevention Plan (SPPP) in the form of theexisting grading permit application process. This gives the contractor or employees awareness ofthe possible source of pollution on the work-site and suggests measures that prevent thatpollution from entering the environment. It will guide designers, reviewers, inspectors,construction site operators, and contractors to Volume 4 Stormwater Best Management Practices(BMP) for a selection of acceptable measures that can be incorporated into an effective SPPP. Itis intended to be a discussion parallel to Volume 4-Section 1 with broader implications tocontractor management practices and industrial/commercial management practices.

This chapter predominately provides guidance for construction site SPPP preparation, but alsoprovides a brief synopsis of industrial /commercial site SPPPs. Industrial and commercial sitesshould also consult the Code of Federal Register (CFR) for additional requirements andguidance. In particular 40 CFR Part 112.7 – Guidelines for the preparation and implementationof a Spill Prevention Control and Countermeasure (SPCC) Plan and 40 CFR part 112 – OilPollution Prevention should be reviewed.

13.1 Introduction to SPPP

In essence, a SPPP is a flexible plan by which site-specific pollution sources are identified andstructural or non-structural measures are designed, implemented, maintained, and possiblyredesigned to minimize negative impacts on the surrounding environment. This is a step beyondpre-2000 releases of the Stormwater Management Manual. While a SPPP predominately focuseson stormwater quality, it also gives consideration for air and groundwater quality.

For Metropolitan Nashville and Davidson County, the existing grading permit processadministered by Metro Water Services will be the mechanism for preparation, review and approval of a SPPP. Many portions of what is traditionally known as a SPPP are alreadyrequired by the grading permit process. However, the SPPP development described in thischapter does require that much of the data be considered in a different way and to a further extentin order to adequately address stormwater pollution prevention as required by Volume 1-Section2.2.



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Since the SPPP will be developed as part of the grading permit process, it does not have to beprepared as a separate document. However, the differences in how a SPPP should be distributedfor a construction project and an industrial/commercial facility should be noted. To ensure thatthe SPPP provisions are understood and properly implemented on a construction site, it is best ifthey are intermingled with the construction plans and specifications to be used by the contractor.This will ensure that the SPPP is a project long process and will also ensure that the designengineer is considering the SPPP throughout the site design process and not as an afterthought.If the SPPP is developed for operation and/or maintenance (O&M) of an industrial /commercialfacility, then it should be intermingled with new-employee and periodic training on related O&Mprocedure documentation.

13.2 SPPP Phases

The basic phases of SPPP preparation are the same for both a construction site and anindustrial/commercial facility. They are illustrated in the Figure 13-1.

The SPPP for construction sites should focus predominately on temporary pollution preventionpractices and address long-term or permanent pollution prevention measures that areimplemented during the construction phase. The SPPP for industrial / commercial sites shouldfocus on permanent or long-term practices developed for pollution prevention.

The SPPP phases are basically the same for construction and industrial / commercialdevelopment, except for some differences in how the two are implemented. If the difference isnot noted in the following sections, then it can be assumed that the same basic procedure applies.

It is important to note that the process parallels the “traditional” site development design processdescribed in Volume 1-Chapter 4. The SPPP preparation should be integrated into theconstruction design process and not left as an afterthought to site design. SPPPs that areprepared as an afterthought may cause the site to be redesigned, be more expensive toimplement, increase long-term maintenance responsibilities, and reduce aesthetic characteristics.



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Figure 13-1SPPP Phases

Final Stabilization / Termination and Evaluation§ Final Stabilization§ Notice of Termination§ Evaluate SPPP Performance

Certification, Notification and Plan Approval§ General Storm Water Permit NOI Certification§ Other Permitting Requirements Notification§ Grading Permit Application and Review Process§ Pre-construction Inspection

Construction / Implementation§ Implement / Construct Practices§ Inspect and Maintain Practices§ Update / Change SPPP§ Reporting Requirements for Spilled Materials

Practice Selection / Plan Design§ Select Permanent Treatment Practices§ Select Erosion Prevention and Sediment Control (EP&SC) Practices§ Select Other Temporary Practices§ Prepare Inspection And Maintenance Plan/Requirements§ Prepare Phased Schedule

Assessment§ Hydrologic and Receiving Waters Evaluation

Site Evaluation and Design Development§ Collect Site Information§ Develop Site Plan and Map



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13.3 Construction Site SPPP

13.3.1 Site Evaluation and Design

13.3.1.1 Collect Site Information

Site information principally consists of the existing conditions survey (topography, existing siteimprovements, etc.), soils, receiving waters identification, and rainfall data. The data collectiontask should identify pollutants that are already on-site whether in the form of soils, groundwater,surface water or other means. The list / survey of on-site pollutants and other existing conditionswill serve as the basis for all other SPPP preparation activities. Other site data collectionactivities are described in detail in Volume 2-Chapter 11.

For indoor construction activities such as renovations at a commercial or industrial facility, thistask is generally not as intensive. However, there are several tasks that should be completed.The Superfund Amendments and Reauthorization (SARA) Title III Section 312 and 313 reportsmay be a quick tool in completing several of the tasks. The following tasks should beconsidered.

1. Complete a materials inventory that includes all hazardous or non-hazardous materials storedor handled that have a bearing on the potential for stormwater pollution. The Material Safetydata sheets of all on-site stored or handled materials should be reviewed.

2. Complete a spills inventory that includes spills over the previous five years. This will be auseful tool in determining areas or personnel that may have a bearing on the SPPP.

3. Begin an activities list. If the list changes in any way, it may be time to reevaluate the SPPP.

4. Conduct a facility tour to confirm or locate activities and stormwater management practices.At a minimum, the following questions should be answered:a. Are catch basins full of sediment and not being cleared regularly?b. Are there signs of spills, pools, stains, or other traces of fuels and chemicals that have

been spilled?c. Do you find leaking equipment, pipes, containers or lines?d. Do storage containers show signs of leakage?e. Are containers and exposed piping labeled?f. Are cleanup tools and materials readily available (drip pans, absorbents, rags, etc.)?g. Are there spill containment or other structural secondary containment measures in place

where oils, greases, toxic or hazardous materials are stored or used?h. Where does stormwater from the site enter the drainage system (Metro infrastructure,

creek, stream or river)? Are these outfalls protected with any type of stormwater quantityor quality BMP?



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i. Does the facility show signs of poor housekeeping such as accumulated debris in openareas that is not being swept, uncovered materials, etc.?

5. Identify non-stormwater discharges (or outfalls) to the stormwater (drainage) system. Thismay include process water, cleaning or rinse waters or even sanitary sewer lines. If any ofthese waters are entering the stormwater system then contact the MWS Stormwater NPDESOffice at (615) 880-2420.

13.3.1.2 Develop Site Plan and Map

The site plan and map are a narrative and visual description of the SPPP. They areinterdependent document designed to provide details that can only be provided in one form orthe other. Key pollution prevention principals that should be considered for construction sitesinclude the following.

1. Install perimeter sediment control practices before any other land disturbance activities.2. Disturb the smallest vegetated area possible.3. Phase or schedule land disturbance activities.4. Stabilize denuded areas quickly or before rain events with erosion prevention practices.5. Keep cut and fill volume to a minimum by designing structures to the site rather than the site

to fit the structures.6. Limit impacts to steep slopes, waterways, sinkholes, and wetlands.7. Consolidate or centralize contractor management activities such as material storage, concrete

truck washing, vehicle maintenance and fueling, etc.

In addition to reducing the potential for pollution to leave the construction site, incorporating theabove pollution prevention principals can also: reduce construction costs for grading andlandscaping, reduce the amount of sediment and stormwater management controls, and improvethe aesthetics of the completed project.

For SPPP consideration, the maps need to show pre and post construction slopes, drainagepatterns, disturbed areas and disturbance restrictions such as a regulated buffer (Volume 1-Section 5.9), steep slopes, sinkholes or wetlands. Pre and post construction slopes are generallyshown on a single plan sheet with different line types and symbols. Similar plan sheets shouldbe prepared indicating the flow directions and drainage catchments for pre, post, andintermediate construction phases. The intermediate flow paths and drainage catchments willimpact the design requirements for erosion prevention or sediment control measures. The sameplan sheets can be used to delineate phased disturbance areas and stabilization techniques. All ofthe plans should indicate sensitive areas and buffers that shall not to be disturbed by any type ofconstruction activity. Similarly, the plans should indicate areas where vehicles should bedirected, such as entrances, interim stabilized roads, etc.



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The narrative portion of the SPPP should be presented in notes on the construction plans. Theyshould be specific enough to match details presented on the construction plans. In particular, it ispreferred that separate sheets be used to describe the phased implementation of variousmanagement practices and other construction activities (such as clearing and grubbing,excavation and stockpiling, rough grading, final or finished grading, demolition, etc). The SPPPshall be stamped by a registered professional engineer in Tennessee.

For industrial or commercial operations (non-construction) a more simple map or site renderingmay be appropriate. It should still indicate drainage areas or general flow paths and sensitiveareas. It should also indicate areas where hazardous or other materials are stored or used.

13.3.2 Assessment

This task focuses primarily on the hydrologic evaluations that are described in Volume 2-Chapter 2. These activities are also required to develop stormwater quantity controls and involvecalculating site drainage areas, runoff characteristics, and determining if any special provisionsmay be necessary to prevent negative impacts to receiving waters. Drainage areas should becalculated manually or electronically from accurate survey data. The runoff characteristics canbe calculated in terms of the rational method runoff coefficient or the NRCS curve number asdiscussed in Volume 2-Section 2.3. The sensitivity of the receiving waters may guide thedesigner to implement more intensive internal and/or perimeter controls for sediment or otherwater quality issues. A good guide to determining the sensitivity of a receiving water is todetermine if and why it appears on the Tennessee Department of Environment and Conservation(TDEC) 303(d) list of threatened or impaired waterways. The list may be acquired from TDECat http://www.state.tn.us/environment/wpc/index.html.

For an industrial/commercial site, the results of the inventories and site tours described inSection 13.3.1.1 should be used to guide an assessment for how intensive stormwater pollutionprevention practices need to be implemented. Special emphasis should be given to BMPs atoutfalls and the receiving water sensitivity.

13.3.3 Practice Selection / Plan Design

Volume 4-Section 1 discusses the process for selecting BMPs in terms of defining objectives andcategories in conjunction with the “BMP Treatment Train”. The March 2000 release of Volume4 has an extensive set of BMP fact sheets sectioned as follows.

Section Description2 Contractor Management Practices – CP3 Temporary Construction Site Management Practices – TCP4 Industrial / Commercial Management Practices – ICP5 Permanent Erosion Prevention and Sediment Control practices – PESC6 Permanent Treatment Practices – PTP



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Section 1 should be reviewed to help guide in the preliminary BMP selection process andSections 2 through 6 should be reviewed to guide the final selection, design, construction /implementation, inspection and maintenance requirements, and other related discussion topics.

13.3.3.1 Select Permanent Treatment Practices

Volume 4-Sections 1.5 and 1.6.5 provides additional detail about selecting permanent treatmentpractices that address stormwater quantity (flood control) and quality. They refer to Volume 4-Section 6 (Permanent Treatment Practices – PTP) and should be reviewed to guide the selectionof permanent practices.

It is preferred to integrate permanent stormwater management practices into the temporarymeasures. This often takes the form of an over-excavated detention pond and modified outletstructure so that it functions as a sediment trap or pond that holds the large sediment loadsexpected during construction. Other measures include, but are not limited to, protecting /reinforcing selected (not all) catch basins to trap sediment or using areas that will not bedisturbed such as buffers and filter strips. Integrating permanent stormwater managementfeatures and site conditions into the temporary measures is generally most cost-effective, easierto construct, inspect, and maintain.

In Metropolitan Nashville and Davidson County, all construction sites of a size requiring agrading permit must have perimeter (outfall) EP&SC practices installed and inspected by Metropersonnel before additional construction is permitted. This means that if a detention pond isgoing to serve as the control before discharging water from the site, then it must be constructedand operational before any other clearing and grubbing, grading or excavation can proceed. Thisis true whether the detention pond is designed to meet stormwater quantity and qualityrequirements or only stormwater quality requirements. In cases where a permanent pond will notbe installed, some type of sediment trap/basin should be installed.

While integrating temporary and permanent treatment practices is generally not a concern fornon-construction activities at industrial and commercial sites, it is important that employees areaware of their function and sensitivities (how their function can be impaired or overwhelmed).

More detailed guidance on selection and design of permanent treatment practices is provided inVolume 4-Sections 1 and 6 (Permanent Treatment Practices – PTP).

13.3.3.2 Select Erosion Prevention and Sediment Control (EP&SC) Practices

Volume 4-Section 1.6.4 provides additional detail about selecting EP&SC practices thatminimize disturbed area, stabilize disturbed areas, protect the upstream and downstream siteperimeter, create internal swales and ditches, minimize internal erosion and protect stormwaterinlets and outlets. They refer to Sections 3 (Temporary Construction Site Management Practices



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– TCP) and 5 (Permanent Erosion Prevention and Sediment Control practices – PESC). TheseSections in Volume 4 should be reviewed to guide the selection of EP&SC practices.

This activity is generally not applicable to SPPPs for non-construction activities at industrial andcommercial sites. However, inspection and maintenance of permanent EP&SC measures shouldbe considered.

13.3.3.3 Select Other Temporary Practices

As discussed in Volume 4-Section 1.4, there are many other potential pollution problems on aconstruction site besides erosion and sedimentation. These include nutrients, oxygen demandingsubstances, metals, pesticides, oil, grease, fuels, toxic chemicals, and miscellaneous wastes.These pollutants can originate from a variety of activities including paving operations, painting,sandblasting, demolition, materials storage, equipment fueling and maintenance, and other dailyactivities necessary for project construction or site (industrial or commercial) management.Volume 4-Sections 2 (Contractor Management Practices – CP) and 4 (Industrial / CommercialManagement Practices – ICP) contains a series of management practices that are intended tominimize the impact of non-sediment pollutants. These sections of Volume 4 include a varietyof activities, often referred to as “good housekeeping practices,” that seem to be common-senseand self-evident activities, but are often overlooked or taken for granted on sites, to the pointwhere the pollutant sources are not recognized or identified. For industrial/commercial sites,employee training about the SPPP provisions is critical for ensuring that the plan is effectivelyimplemented and maintained.

13.3.3.4 Prepare Inspection and Maintenance Plan / Requirements

Inspection and maintenance procedures for a SPPP are often not well thought out and noteffectively carried out. Often the procedures are overlooked because responsible personnel havenot been identified. These procedures need to be developed in realistic terms and withexpectations so they can be thoroughly explained to appropriate personnel. Ideally a pollutionprevention team lead by a team coordinator and composed of a sufficient number of personnel tocover all aspects of the site operation should be established. The team should be used as amechanism to discuss and train all personnel in detail on the SPPP. The team members shouldperform routine inspections and inform the team coordinator of any changes in operations thatmay affect the SPPP.

For a construction site the pollution prevention team this should include the site foreman, vehiclemaintenance and fueling personnel, heavy equipment operators (grading and buffer issues), etc;and for an industrial/commercial site the plant supervisor, hazardous material handlers,management, etc. SPPP review and discussion should be a part of new employeetraining/certification programs.



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For a construction site, the inspection and maintenance responsibilities should be presented alongwith other construction plans, specifications, and notes. It should explain the frequency thatinspections should be performed, how they should be documented, and typical maintenanceactivities. Generally, inspections should be performed and documented weekly or after a rainevent greater than 0.25 inches. There are more specific inspection recommendations for BMPspresented in Volume 4.

Permanent facilities that are to be turned over to Metro or to another owner or organizationshould have detailed inspection and maintenance requirements and expectations documented.These requirements and expectations should be submitted as part of the grading plan approvalprocess for review by MWS Stormwater Development Review. At a minimum, a Stormwater Detention Agreement should be prepared and accepted as presented in Volume 1-Appendix C. Similar agreements or explanation of responsibilities should be prepared for property owners.

For an industrial / commercial site, the inspection and maintenance responsibilities should bepresented in operation and maintenance documentation. They should be discussed to anappropriate level in new employee training and in thorough detail to personnel that areresponsible for inspecting and maintaining the facilities. This information should be periodicallyreviewed to ensure the requirements are “fresh” in the minds of the employees.

13.3.3.5 Prepare Phased Schedule

As discussed in Section 13.3.1.2 above, phased construction can provide a significant benefit inimplementing an SPPP. This schedule does not need to be date specific, but should indicatewhat BMPs should be constructed or modified while other aspects of the construction are beingexecuted. This may be as simple as noting that temporary seeding, mulch and geotextiles beapplied/installed within one week of rough grading. Similarly, other task schedules can be notedon the construction plans. There should be an overall schedule presented that indicates theoverall phases of construction that major BMPs will be implemented/constructed. At aminimum, this should show that the perimeter outfall controls will be in-place before anygrading is performed.

A documented schedule is also necessary for industrial/commercial sites, but is applieddifferently than for construction. There should be a schedule of inspection and maintenanceactivities as described in the previous section. This can be prominently posted, but should atleast be identified in some manner, as in employee training.



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13.3.4 Checklist , Certification / Notification

13.3.4.1 General Storm Water Permit NOI Certification

As required by Volume 1-Section 4.2.2 each application for a grading permit shall beaccompanied by a certification that a Notice of Intent (NOI) has been submitted to the TennesseeDepartment of Environment and Conservation (TDEC) for a “General Storm Water Permit” or acertification that it is not required. The review of the plans will proceed if the certificationindicates that the applicant will submit the permit number at a later date. If the site requires aTennessee General Storm Water Permit, the permit number must be submitted to MWS beforea grading permit is issued. This certification is presented in Volume 1-Appendix A.

13.3.4.2 Other Permitting Requirements Notification

An application checklist is provided in Volume 1-Appendix A to assist the applicant in preparinga complete application package and thereby help with a timely review. The applicant shall attacha signed copy of the checklist with the application to certify that a complete package is beingsubmitted. Some requirements of the checklist will not be applicable to all projects, dependingon the permit being requested. These should be checked as not applicable. Omission of anyrequired items shall render the plans incomplete, and they shall be returned to the applicant, ortheir engineer, for additional information.

The checklist in Volume 1-Appendix A includes a notice that the applicant be aware of certainland disturbance activities that will impact “Waters of the State”, “Wetlands”, and/or“Sinkholes”, which may be required to meet certain State and Federal regulations. It is theresponsibility of the applicant to seek out and obtain any applicable State and Federal permitsprior to the initiation of any land disturbance activities.

13.3.4.3 Grading Permit Application and Review Process

Volume 1-Section 3.3 through 3.6 discusses the grading and building permit requirements,exemptions, and variances. Volume 1-Chapter 4 discusses the grading permit procedures andshould be reviewed before preparing plans for submittal.

Completion of the “Plan Submittal Information Form” is especially important for timely planreview by MWS. Each plan being submitted to MWS is to be accompanied by a completed“Plan Submittal Information Form”. This form is available in Volume 1-Appendix A or on theStormwater Program's website at http://www.nashville.gov/stormwater. The applicationfor a grading permit will not be accepted unless this form has been completed. Each applicationfor a grading permit or a building permit referred to the MWS shall contain site preparationplans certified by a registered engineer, landscape architect, or land surveyor, as appropriate.Plans are to include grading, drainage, and EP&SC plans with appropriate plan and profile sheets



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for proposed streets or roads, and details of the stormwater quantity and quality managementsystems (or SPPP provisions).

13.3.4.4 Pre-construction Inspection

According to Volume 1-Section 2.2.7 Metro is required to inspect temporary or permanentEP&SC measures for a site before additional construction may proceed. In essence, Metroinspectors will check downstream perimeter sedimentation controls and/or upstream erosionprevention measures to ensure that they are properly located and operating to a level that cankeep sediment from leaving the site while under construction. This does not mean that no otherEP&SC measures will be needed, but that the BMPs presented on the grading permit applicationplans will work sufficiently with the perimeter controls. This also gives Metro the authority toprevent work from progressing if a permanent facility does not adequately address stormwaterquantity (flood) management.

Metro reserves the right to require the grading plans be modified given any observations orevaluations that suggest stormwater quantity or quality management is not sufficiently addressed.This may be caused by differences between the actual site conditions and the plans or other dataevaluated by Metro.

13.3.5 Construction / Implementation

13.3.5.1 Implementation / Construction Practices

After the plans have been accepted by MWS Stormwater Development Review, other appropriateagencies, and the pre-construction inspection has been completed to the satisfaction of theMWS, construction may proceed. To ensure that BMPs are adequately implemented /constructed, it is important that the work crews which install the measures are experienced,adequately trained personnel or are overseen by experienced, adequately trained personnel.Improperly implementing / constructing some BMPs can result in little or no positive effect andmay actually intensify the pollution impact they are intended to minimize.

For an industrial / commercial site, practices are implemented by integrating them into daily,weekly and monthly routines. It is important that all key staff are aware of the plan and that it isaccessible to all employees. A copy of the plan should be kept in a conspicuous location whereall employees may review it, whether for normal activities or for emergency and spill response.

13.3.5.2 Inspection and Maintenance Practices

According to Volume 1-Section 2.2.15 Metro may require that an “erosion prevention andsediment control professional”, or other similar person designated by TDEC or Metro be on-site.This is to ensure that these types of practices are adequately maintained and that it is clear whoshall be held accountable for the BMP performance.



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As indicated in Section 13.3.3.4, inspections should be performed and documented weekly, aftera rain event greater than 0.25 inches, or at frequencies indicated for specific BMPs identified inVolume 4. Permanent BMPs generally require less frequent inspection and maintenance.However, they should be inspected at rates presented in Volume 4. For a construction site,weekly inspections and maintenance should be done even if the plans or specifications do notindicate the procedures as recommended in Section 13.3.3.4. Maintenance issues identified byinspections should be resolved within a week or less, depending on the severity of the potentialpollutant impact. BMPs that are found to be insufficient should be augmented or replaced withother BMPs that can more effectively manage the pollutant of concern.

As an example, a construction site detention pond is being overwhelmed with sediment to thepoint that it can not contain the sediment and may cause flooding problems. It likely needs to becleaned out (excavated) to an effective depth and mulch or geotextiles applied to the slopetributary to the pond and/or check dams installed in the small channels leading into the pond.

For an industrial/commercial site inspection and maintenance procedures, BMPs should bedocumented in a readily accessible document, as explained in the previous section. There needsto be some sort of follow-up checking on personnel activities and structural BMPs should beroutinely inspected. Some mechanically intensive BMPs such as stormwater treatment systemsmay need thorough periodic inspection by a technician trained in the operation and maintenanceof that specific system.

13.3.5.3 Update / Change SPPP

Inevitably, there are site or operating conditions that are not anticipated. This requires flexibilityin implementing the SPPP and overall grading permit. The ultimate goals are to limit the releaseof sediment from the construction site and to prevent other pollutants from being released intothe surrounding environment. Metro reserves the right to enforce the implementation ofadditional controls even if all the measures presented in a grading permit (and SPPP) areimplemented effectively. This means that even if a contractor has constructed and implementedall the BMPs shown or described in the construction plans, additional BMPs must beimplemented if sediment or a pollutant is leaving the site in levels that could negatively impactthe surround environment, in the opinion of Metro staff.

A similar rationale should be applied to industrial/commercial sites. If a BMP is not effectivelypreventing stormwater pollution, then it should be modified or replaced by more intensivepractices.

As the SPPP is changed, appropriate personnel and the MWS should be notified. MWSreserves the right to require additional changes if the plan is deemed to be inadequate for theconditions, as determined by MWS.



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13.3.5.4 Reporting Requirements for Spilled Materials

Spill prevention and control are discussed in more detail in Volume 4-Section CP-06. Thefollowing are general guidelines for reporting a significant spill.

1. Notify the Engineer immediately and follow up with a written report.

2. Notify the local emergency response agency at (615) 862-8530. In addition to calling911, the contractor will notify the proper county officials. It is the contractor'sresponsibility to have all emergency phone numbers at the construction site.

3. For spills of state reportable quantities or into a waterbody or adjoining shoreline, thecontractor shall notify the TDEC general hotline – environmental assistance at 1-888-891-8332 (TDEC).

4. For spills of federal reportable quantities or into a waterbody or adjoining shoreline,the contractor shall notify the National Response Center at (800) 424-8802.

5. Notification should first be made by telephone and followed up with a written report.

6. The services of a spills contractor or a haz-mat team shall be obtained immediately.Construction personnel should not attempt to clean up the spill until the appropriateand qualified staff have arrived at the job site. The level where this is necessaryshould be defined in the SPPP and understood by all personnel.

7. Other agencies which may need to be consulted include, but are not limited to, theFire Department, the Department of Public Works, Metro Water Services, the MetroPolice Department, OSHA, etc.

A similar response procedure as presented above should be included in the SPPP and includepertinent phone numbers for staff members and emergency personnel and agencies.

13.3.6 Final Stabilization / Termination

13.3.6.1 Final Stabilization

For a construction site, the permanent BMPs should be cleaned and stabilized to the conditionsindicated in the construction plans. This may require detention pond re-excavation, final gradingand geosynthetic stabilization, system flushing (Volume 4-Section CP-20), catch basin cleaning,water quality inlet/device cleaning, filter system media replacement, etc. All of these and otherrelated activities will be required by Metro before a Use and Occupancy Permit is issued or abond is released.



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13.3.6.2 Notice of Termination

For construction sites, Metro manages construction site termination through the Use andOccupancy Permit or the bond release. They are contingent upon proper construction,stabilization and operation of all stormwater quantity and quality management practices andother construction. If permits or notification were required by other agencies, then it is theresponsibility of the developer, or their representative, to terminate the project with regards tothat other agency.

13.3.6.3 Evaluate SPPP Performance

When a construction project is completed, the developer, engineer, and contractor shouldevaluate the practices that were effective for the specific site conditions. Noting howmanagement practices may be more effectively implemented will reduce the costs ofimplementing adequate stormwater pollution prevention measures on the next constructionproject.

For an industrial/commercial site, if a pollutant source has been eliminated, then it is acceptableto stop certain non-structural practices or not to utilize a specific structural management practice.If that is the case, the SPPP should be reevaluated and modified to account for the change.

13.4 References

The following documents were either quoted or used as reference guides in preparing thissection. They may be useful as additional guidance for preparing and implementing effectiveSPPPs.

California Storm Water Best Management Practice Handbooks, Construction and Industrial Handbooks,CDM et.al. for the California SWQTF, 1993.

Caltrans Storm Water Quality Handbooks, CDM et.al. for the California Department of Transportation,1997.

Storm Water Management for Construction Activities and Developing Pollution PreventionPlans and Best Management Practices, United States Environmental Protection Agency. 482N.Washington DC. September 1992.

Documents

CHAPTER 13 STORMWATER POLLUTION PREVENTION PLAN